Measurement-computing ADLIB WIN Instrukcja Użytkownika Pobierz pdf (Strona 75)

Chapter 20 Triggering Modes

19-7

19.6 AL_SetTriggerOutput

Prototype C\C++

ERRNUM AL_SetTriggerOutput(LHLD lhld, LPSTR lpstrMode);

Visual Basic for Windows

Function AL_SetTriggerOutput(ByVal lhld As Long,

ByVal lpstrMode As String) As Long

LHLD lhld handle of the LDSD

LPSTR lpstrMode address of the TriggerOutput mode string

The AL_SetTriggerOutput function sets the hardware TriggerOutput operation mode of the LDSD. For

the PCI 5500 and Pci55xx Series the AtoD device can be configured to output a signal when it has been

triggered. This allows multiple boards to be connected together which are triggered simultaneously form a

single trigger source that is daisy chained to additional boards.

For the Pci55xx Series the signal ADTGOUT is available to output it’s trigger source. Each time the ADC

is triggered from any of the available triggering sources the ADTGOUT signal pulses high for a period of

1 microsecond. This output can be used to synchronize the triggering of multiple A/D converters on

different PCI cards.

Parameter Description

lhld Identifies the instance of the logical device subsystem.

lpstrMode Points to the desired TriggerOutput mode string. The available string settings

are

device independent and are verified by ADLIB against the available trigger

mode options specified in the device's capabilities file.

Returns:

On success ERRNUM is set to 1, otherwise ERRNUM contains the last error code that occurred during the

call.

Related Functions:

AL_SetTriggerMode

AL_SetTriggerSource

AL_SetTrigSourceSignal

AL_SetPostSampleCount

AL_GetTriggerStruct

AL_GetTriggerOutput

Supported Logical Device Subsystems:

Pci55xx Series: ADC0, Options: ENABLED, DISABLED

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